Sam R.

Embedded systems engineer with hands-on experience across the full product stack — from hardware design and firmware to wireless connectivity and companion apps. I've built and shipped real products along with a variety of prototypes and proofs. **Core Skills:** • Microcontroller firmware (ARM Cortex-M, Nordic nRF series, STM32, ESP32) • Wireless stacks — Wi-Fi, BLE, sub-GHz • Network protocols - MQTT, CoAP, REST, HTTP • PCB design, schematic capture, and hardware bring-up • Mobile & wearable companion apps — iOS, watchOS, Garmin Connect IQ • IoT system integration — cloud connectivity, OTA Firmware, device management • Embedded Linux — Raspberry Pi, single-board compute, display pipelines I work best with startups and product teams who need an engineer that can own a problem end-to-end — from silicon to the app that talks to it.